Heating-stove.



C. lbf-'ENFERv HEATING sTovE. (Applviegsion'md'gny am, 1901.)

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THE Noams PETERS co, PHuTaLITr/ml. WASHINGTON, n. c.

i UNITED-STATES PATENT OFFICE.

CHARLES o. PFEIFFER, on LOUISVILLE, KENTUCKY.

' Hx-:A'TING-STOVE.

SPECIFICATION forming part of Letters Patent No. 693,488, dated February 18, 1902. g Y.

Application led May 23, IQl.

The object of the invention is to produce an updraft or downdraft stove of special construction.

Figure lis-a Vertical central section of "so much of the stove as is necessary to illustrate the invention. Fig. 2 i s a'liorizontal section on lines 2 2, Fig. l. Fig. 3`isa horizontal section on lines 3 3, Fig.v 1. Fig. -ft is a plan of the basesection, the top plate removed from .one side to show partition." Fig. 5 is a vertical section, partly in elevation, showing usual position and relationof Vparts when the stove is inuse as a downdraftstove.

A indicates the bottom-ohamberof the stove, below the ash-box. This chamber is prefer- -ably rectangular, with fiat top and bottom,

and is divided by partitions a, a, extending from top to bottom of the chamber and eX- tending forward from the` back plate, say,

about two-thirds of the distance to the front plate. A rear pocket or recess a connects with the up-flue B. Openings a2 through the top plate of chamber A permit the passage of gases in downward direction to thespaces a3 outside the partitions in chamber A, and the gases, when the damper is turned to downdraft, take the general direction indicated by arrows in Fig. 5.

The ash-box C has any usual ash-receptacle therein. At each side of the main compartment C and in rear of the middle there is a downdraftflue c. These downdraft-ues communicate with the passagesA 12in the basechamber. As the ues c are near the rear corners of the ash-box they leave room for an ash-pan to be entered from the front and to extend between these flues c nearly to the full width of the ash-'box- C.

Above the ash-box' C the fire-pot D is arranged. This Jre-pot is preferably a metallic casing having grated passages d through the side Walls, preferably at each side, in rear had therein to theac-v senti No. 61.530. (No modem of themiddleof the nre-pot. outside the `fire-pot are downdraft-Iiues dclosed at the in the tire-pot are small enough to prevent Ithe passage of coal of thesize adapted to the stove. When the damper is turned to cause ldownd'ra'ft, such draft Vwill be through' the 'openings d, through down-dues d' and Gand openings@la to the due-passages as, thence to the central part ot' chamber A,

The main body of the air to lsupport com- Ibustion when the damper F is turned to cause downdraft enters through the'opening Lin l the top of the stove and passing through the telescopic passage or tube K K, which is preferablyth'en elongated, enters the body of the coal at the top. If some small quantity of air enters the bottom of the'coal through the grate, this isfpractically a negligible quan- 't-ity. The ash-pit door can be regulated to exclude any considerable entrance of air at the bottom, as in many stoves of usual construction.,- v Y v The direct draft of the stove will be as usual in heating-stovesupward from the fire-pot lto smoke-flue Evand so up through Ypipe B.

.This is the natural course of draft when damper F is turned down, as in Fig. l. that position the damper closes the (lue B, and thus prevents a downdrafr. f

When the stove Aacts as an updraft-stovc, the openings -L in the top will be closed and the telescopic tube-section K may be drawn up, as in Fig. l, or the same mayact as a reservoir. Q

When the damper F is turned upward to the' dotted position, Fig. l, it shuts. olf passage E and opens passage B. This causes the gases to pass out the holes d in the fire-pot and so downward to the lower chamber, then IOO forward and again rearward and up pipe B to the escape B.

A telescopic downdraft-tube K is preferably arranged above the central part of the fire-pot. When the damper is turned to downdraft, this tube K may be extended downwardly nearly to the level of the top of the fire-pot, as indicated in dotted lines, Fig. l, and the air may then be taken in at the grating L above the telescopic tube.

The air, whether taken in at grating L or otherwise admitted to the chamber above the fire-pot, will when the damper is turned to downdraft pass through the burning coal to the level of the side openings in the fire-pot, then through such openings, and so down the downdraft-lues, as has been explained.

The tube-section K may be held in adj usted position on the inner tube L by friction or in other usual manner as is common in magazine-stoves. While burning coal adapted to such uses, the tube K K may be used as a magazine. In such case the air fed to the fire when the stove is acting as a downdraftstove may enter through opening M in the stove-top or in other convenient Way.

This stove may be readily adapted to burn either hard or soft coal, the arrangements for air supply and draft permitting wide diversity in the matter of combustion.

What I claim is- 1. In a heating-stove, the fire-pot having openings at its sides below the top thereof, and draft-flue casings resting against the sides of the fire-pot and forming with the fire-pot downdraft-flues beginning below the top of the fire-pot and extending downward to the base of the stove, the designated elements and their necessary adj uncts 'in combination to cooperate, substantially as described.

2. In a heating-stove, the combination of the fire-pot having grated side openings below its top, and draft-flue oasings resting against the fire-pot and forming the top and outer covering of the downdraft-iiues, said flues having downward extensions through the ash-pit and opening into the base of the stove, substantially as described.

3. In a heating-stove, the combination of the fire-pot having openings at each side and near the rear part of the stove, casings over these openin gs forming with the re-pot downdraft-ilues, which ilues are continued in the form of iiattened or concavo-couvex pipes down through the ash-box and near the rear corners thereof, said fines opening into the lower chamber of the stove near the rear corners thereof, substantially as described.

4. In a heating-stove, the combination of a lire-pot with openings below its top and downdraftfines extending from said openings down through the ash-pit and into the base of the stove, and a telescopic air-supply tube extending from the top of the stove down nearly to the top of the iire-pot, said air-tube having air-supply openings at its upper end, substantially as described.

5. In a heating-stove, a fire-pot having side openings at each side and below the top thereof, a downdraft-Iiue cover at each side of the fire-pot, the flue formed by said cover and fire-pot body being closed at its top below the top of the fire-pot, opening downward and covering said fire-pot openings, down-ilues leading from said fire-pot iiues into the basechamber of the stove, side 4i'lues leading forward and a central flue leading backward in said base, and a pipe leading up from the central base-flue to the chimney,all combined substantially as described.

6. In a heating-stove, a fire-pot having a grated passage in its side walls, a downdraftflue, closed at its top, and attached to the firepot at its edges at the sides of said passage, so as to receive the gases which pass through said grating, a down-Hue forming a continuation of said down-fine on the fire-pot, and means for supplying air for combustion at the to'p of the fire-pot, all combined.

7. In a heating-stove, the fire-pot having side openings, down-fines connected to said side openings below the top of the fire-pot, and a damper controlling gas-escape from the down-flue, an extensible telescopic air-pipe leading from the top of the stove to near the top of the fire-pot, and a grating at the top of said air-pipe, all combined.

In testimony whereof I alix my signature in presence of two witnesses.

CHARLES C. PFEIFFER.

Witnesses:

N. A. RICHARDSON, G. W. BUCK. 

